Write an OnDsnKeyDown event handler to take specific action when user presses any key in active designer. 

Sender is the corresponding designer. 

The Key parameter is the key on the keyboard. For non-alphanumeric keys, use virtual key codes to determine the key pressed. For more information, see Virtual Key codes. 

The Shift parameter indicates whether the Shift, Alt, or Ctrl keys are combined with the keystroke.

TDesignerEvents Events